Exercise

Set - 6

Question 11 :

What is the difference between a while statement and a do statement?

Answer :

A while statement checks at the beginning of a loop to see whether the next loop iteration should occur. A do statement checks at the end of a loop to see whether the next iteration of a loop should occur. The do statement will always execute the body of a loop at least once.

Question 12 :

How are the elements of a GridBagLayout organized?

Answer :

The elements of a GridBagLayout are organized according to a grid. However, the elements are of different sizes and may occupy more than one row or column of the grid. In addition, the rows and columns may have different sizes.

Java uses layout managers to lay out components in a consistent manner across all windowing platforms. Since Java's layout managers aren't tied to absolute sizing and positioning, they are able to accommodate platform-specific differences among windowing systems.

Question 14 :

What is the Collection interface?

Answer :

The Collection interface provides support for the implementation of a mathematical bag - an unordered collection of objects that may contain duplicates.